<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片试图 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addRolesVisible = true">添加角色</el-button>
                </el-col>
            </el-row>
            <!-- 角色列表区域 -->
            <el-table :data="rolesList" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '' , 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag @close="removeRightById(scope.row, item1.id)" closable>{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二、三级权限 -->
                            <el-col :span="19">
                                <el-row :class="[i2 === 0 ? '' : 'bdtop' , 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                                    <!-- 左边二级权限 -->
                                    <el-col :span="6">
                                        <el-tag @close="removeRightById(scope.row, item2.id)" closable type="success">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <!-- 右边三级权限 -->
                                    <el-col :span="18">
                                        <el-tag @close="removeRightById(scope.row, item3.id)" closable type="warning" v-for="(item3, i3) in item2.children" :key="item3.id" >{{item3.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>

                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column label="#" type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit" @click="showRoles(scope.row.id)">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRolesById(scope.row.id)">删除</el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>

        <!-- 添加角色对话框 -->
        <el-dialog title="添加角色" :visible.sync="addRolesVisible"
        width="50%" @close="addRolesClosed">
            <!-- 内容主体区域 -->
            <el-form :model="addRoles" :rules="addRolesRules" 
            ref="addRolesRef" label-width="100px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addRoles.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addRoles.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addRolesVisible= false">取 消</el-button>
                <el-button type="primary" @click="addUse">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 修改用户对话框 -->
        <el-dialog title="修改角色" :visible.sync="editRolesVisible"
        width="50%" @click="editRolesClose">
            <el-form :model="editRoles" status-icon :rules="editRolesRules" ref="editRolesRef" label-width="100px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="editRoles.roleName" disabled></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="editRoles.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="editRolesVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRolesInfo">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 分配权限对话框 -->
        <el-dialog
        title="分配权限" :visible.sync="setRightDialogVisible" 
        width="50%" @close="setRightDialogClosed">
        <!-- 树形空间 -->
            <el-tree :data="rightsList" :props="treeProps" 
            show-checkbox node-key="id" default-expand-all 
            :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>

    </div>
</template>
<script>
export default {
    data(){
        return {
            //所有角色列表数据
            rolesList:[],

            //控制添加角色对话框的显示与隐藏
            addRolesVisible: false,
            //添加角色的表单数据
            addRoles: {
                roleName:'',
                roleDesc:''
            },
            //添加表单的验证规则对象
            addRolesRules: {
                roleName: [
                    {required: true, message: '请输入角色名称', trigger: 'blur'},
                    {
                        min: 3, 
                        max: 10,
                        message: '角色名称的长度在3~10个字符之间', 
                        trigger: 'blur'
                    }
                ],
                roleDesc: [
                    {required: true, message: '请输入角色描述', trigger: 'blur'},
                    {
                        min: 5, 
                        max: 20,
                        message: '角色描述的长度在5~20个字符之间', 
                        trigger: 'blur'
                    }
                ]
            },

            //控制修改用户对话框的显示与隐藏
            editRolesVisible: false,
            //查询到的角色信息对象
            editRoles: {},
            //修改表单的验证规则对象
            editRolesRules: {
                roleName: [
                    {required: true, message: '请输入角色名称', trigger: 'blur'},
                    {
                        min: 3, 
                        max: 10,
                        message: '角色描述的长度在3~10个字符之间', 
                        trigger: 'blur'
                    }
                ],
                roleDesc: [
                    {required: true, message: '请输入角色描述', trigger: 'blur'},
                    {
                        min: 5, 
                        max: 20,
                        message: '角色描述的长度在5~20个字符之间', 
                        trigger: 'blur'
                    }
                ]
            },

            // 控制分配权限对话框的显示与隐藏
            setRightDialogVisible: false,
            // 所有权限的数据
            rightsList: [],
            // 树形控件的属性绑定对象
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            // 默认选中的节点Id值数组
            defKeys:[],
            // 当前即将分配权限的角色id
            roleId: ''
        }
    },
    created() {
        this.getRolesList()
    },
    methods: {
        //获取所有角色的列表
        async getRolesList(){
            const {data: res} = await this.$http.get('roles')
            if(res.meta.status !== 200){
                return this.$message.error('获取角色列表失败！');
            }
            this.rolesList = res.data

            console.log(this.rolesList)
        },
        //监听添加角色对话框的关闭事件
        addRolesClosed(){
            this.$refs.addRolesRef.resetFields()
        },
        //点击按钮添加新角色
        addUse(){
            this.$refs.addRolesRef.validate(async valid => {
                // console.log(valid)
                if(!valid) return
                //可以发起角色的网络请求
                const {data: res} = await this.$http.post('roles', this.addRoles)
                if(res.meta.status !== 201){
                    this.$message.error('添加角色失败！')
                }
                this.$message.success('添加角色成功！')
                //隐藏添加角色的对话框
                this.addRolesVisible = false
                //刷新对话框,重新获取角色数据
                this.getRolesList()

            })
        },
        //展示编辑角色的对话框
        async showRoles(id){
            // console.log(id)
            const {data:res} = await this.$http.get('roles/' + id)
            if(res.meta.status !== 200){
                return this.$message.error('查询角色失败！')
            }
            this.editRoles = res.data
            this.editRolesVisible = true
        },
        editRolesClose(){
            this.$refs.editRolesRef.resetFields()
        },
        //修改角色信息并提交
        editRolesInfo(){
            this.$refs.editRolesRef.validate(async valid => {
                // console.log(valid)
                if(!valid) return
                //发起修改用户信息的请求
                const {data:res} = await this.$http.put('roles/' + this.editRoles.id, 
                {
                    roleName: this.editRoles.roleName,
                    roleDesc: this.editRoles.roleDesc
                })

                if(res.meta.status !== 200){
                    return this.$message.error('更新用户信息失败！')
                }

                //关闭对话框
                this.editRolesVisible = false
                //刷新数据列表
                this.getRolesList()
                //提示修改成功
                this.$message.success('更新用户信息成功！')
            })
        },
        //根据Id删除对应的角色信息
        async removeRolesById(id){
            // console.log(id)
            const confirmResult = await this.$confirm('此操作将永久删除此角色, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
            }).catch(err => err)

            //如果用户确认删除，则返回值为字符串 confirm
            //如果用户取消了删除，则返回值为字符串 cancel
            // console.log(confirmResult)
            if(confirmResult !== 'confirm'){
                return this.$message.info('已取消删除')
            }
            const {data: res} = await this.$http.delete('roles/' + id)
            if(res.meta.status !== 200 ){
                return this.$message.error('删除用户失败！')
            }

            this.$message.success('删除用户成功！')
            this.getRolesList()
        },

        // 根据id删除对应的权限
        async removeRightById(role, rightId){
            //弹框提示用户是否删除
            const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
                }).catch(err => err)
                if(confirmResult !== 'confirm'){
                    return this.$message.info('取消了删除！')
                }
                const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
                if(res.meta.status !== 200){
                    return this.$message.error('删除权限失效！')
                }
                // this.getRolesList()
                role.children = res.data
        },
        // 展示分配权限的对话框
        async showSetRightDialog(role){
            this.roleId = role.id
            // 获取所有权限列表
            const {data:res} = await this.$http.get('rights/tree')
            if(res.meta.status !== 200){
                    return this.$message.error('获取权限数据失败！')
            }
            // 获取到的权限数据，保存到data中
            this.rightsList = res.data
            console.log(this.rightsList)

            // 递归获取三级节点前的Id
            this.getLeafKeys(role, this.defKeys)
            
            this.setRightDialogVisible = true
        },

        // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
        getLeafKeys(node, arr){
            // 如果当前node节点不包含childre属性，则是三级节点
            if(!node.children){
                return arr.push(node.id)
            }

            node.children.forEach(item =>
                this.getLeafKeys(item, arr))
        },

        // 监听分配权限对话框的关闭事件
        setRightDialogClosed(){
            this.defKeys = []
        },
        // 点击为角色分配权限
        async allotRights(){
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr = keys.join(',')

            const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids: idStr})
            if(res.meta.status !== 200){
                    return this.$message.error('分配权限失败！')
            }

            this.$message.success('分配权限成功！')
            this.getRolesList()
            this.setRightDialogVisible = false

        }
        
    }   
}
</script>
<style lang="less" scoped>
.el-tag{
    margin: 7px;
}
.bdtop {
    border-top: 1px solid #eee;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}

</style>